Will my extension be approved ?

I am working for client A in Denver and my I94 expired in December 2015. I filed for extension in October 2015 and was upgraded to premium processing on 1/12. Got an RFE on 1/21. My current engagement is ending on 1/29 for which extension was filed. I would have to work for a new client B in St. Louis, MO. Can we respond to the RFE with new client details or we have to stick with old client details

It may be tricky to change location now. This would involve filing new LCA, which may not go well at USCIS. I remember reading few similar experience (cap-subject petition and not extension like you), which ended up getting denied.

What is your attorney suggesting?